THE CRUSTACEA OF NEW JERSEY. 403 



also occurs associated sometimes. The above dimensions are a 

 millimeter or so shorter than the maximum size recorded. I 

 have also examined examples from Delaware Bay. Mr. Witmer 

 Stone found it at Point Pleasant. Mr. W. T. Davis found it at 

 Staten Island, N. Y. 



Genus EUPANOPEUS M. J. Rathbun. 

 The Mud Crabs. 



Enpanopeiis M. J. Rathbun, Bull. Labor. Nat. Hist. State Univ. Io,va, IV, 

 1898, p. zyT,. Type Paiiopeus licrbstii Milne-Edwards, designated, first 

 species. 



Panopcus (nee Panopea Menard 1807) Milne-Edwards, Hist. Nat. Crust., I, 

 1834, p. 403. Type Panopens herbstii Milne-Edwards, first species. 



Carapace of moderate width, length two-thirds to three- fourths 

 its width, moderately convex, regions fairly well delimited, 

 crossed by broken transverse lines on front half. Antero-lateral 

 borders horizontal or slightly upturned, shorter than postero- 

 lateral, arcuate, tending to subquadrate, cut into five teeth, in- 

 cluding orbital angle which more or less fused with next tooth. 

 Third, fourth and fifth teeth well marked usually and distinctly 

 dentiform. Outer edge of all teeth sublaminar. Postero-lateral 

 edges of carapace moderately convergent, straight. Fronto- 

 orbital border more than half greatest carapace width. Front 

 between third and fourth greatest carapace width. Front hori- 

 zontal or slightly deflexed, laminar, with median notch, and two 

 sinuous lobes separated from more elevated inner angle of orbit 

 by notch. Orbital edge with two small but distinct V-shaped 

 notches above, continued backward by closed fissures, and broad 

 notch below outer angle. Prominent tooth at lower inner angle. 

 Orbits transversely oblong, not tightly filled by eyes. Inner 

 portion of front edge of basal joint touches front, outer angle of 

 joint prolonged into broad orbital hiatus but not excluding 

 flagellum from orbit. Merus of outer maxillipeds transverse, 

 anterior edge mostly sinuous. Chelipeds unequal in both sexes, 

 merus with superior subterminal tooth, carpus with tooth at inner 

 angle, fingers acute and movable finger of large cheliped with 



